Nut-lock.



0.. H. ROFP.

NUT LOCK Patented Nov. 2, 1909.

ai -hive APPLICATION FILED DEG. 26, 190B.

ami M40000;

CHARLES H. ROFF, OF MADALIN, NEVI YORK.

NUT-LOCK.

Specification of Letters Patent.

Patented Nov. 2, 1909.

Application filed December 26, 1908. Serial No. 469,415.

To all whom it may concern:

Be it known that I, CHARLES H. Born, a citizen of the United States,residing at Madalin, in the county of Dutchess and State of New York,have invented certain new and useful Improvements in N ut-Locks; and Ido declare the following to be a full, clear, and exact description ofthe invention, such as will enable others skilled in the art to which itappertains to make and use the same.

This invention relates to improvements in nut. looks.

The object of the invention is to provide a nut lock which will besimple, strong and inexpensive in construction and eflicient andreliable in operation.

Vith these and other objects in view, the invention consists of certainnovel features of construction, combination and arrangement of parts, aswill be more fully described and particularly pointed out in theappended claim.

In the accompanying drawings, Figure l is an elevation of a bolt and nutshowing the construction and arrangement of my im proved nut lock; Fig.2 is a side view of the bolt showing the construction of the same 0receive the nut lock mechanism; Fig. 3 is perspective view of the keyfor holding the astening nut. against movement.

Referring more particularly to the drawngs, 1 denotes the bolt which hasits threadd end cut away for a portion of its length s substantially thesize and shape of the art of the bolt cut away to form the flat 'urface2.

On the inner end of the key 3 is formed 11 opposite upwardly projectingstop lug which, when the key is in place on the urface 2 of the bolt, isadapted to engage he fastening nut 6 which has been preiously screwed onto the bolt and into enagement with the object to which the boltapplied. The upper surface of the lug 5 is inclined over its outer edgeto a point where it merges into the threads on the key so that thelocking nut 7 is adapted to ride thereon to tilt. the nut upon the boltand key. This action clamps the parts together and prevents the rotationof the lock nut. After the key has thus been arranged on the flatsurface of the bolt with the lug 5 in engage ment with the nut G, alocking nut 7 is screwed on to the threaded end of the bolt and key,thus securely holding the key in place with the lug 5 thereby holdingsaid nut immovable as long as the locking nut 7 is in engagement withany of the threads of the bolt and key.

A nut lock constructed as herein shown and described will positivelyhold the fasten ing nut against movement under all conditions,

The nature of my improved nut lock is such that it may be manufacturedat a comparatively small cost.

The parts of the lock may be quickly and easily applied to lock thefastening nut or released to permit the removal of said fastening nut.

against the nut 6,

From the foregoing description, taken in connection with theaccompanying drawings, the construction and operation of the inventionwill be readily understood Without requiring a more extendedexplanation.

Various changes in the form, proportion and the minor details ofconstruction may be resorted to without departing from the principle orsacrificing any of the advantages of this invention as defined in theappended claim.

Having thus described and ascertained the nature of my invention, what Iclaim as new and desire to secure by Letters-Patent, is

In a nut look, a bolt having a portion of its threaded end cut-away orrecessed to form a flat locking surface, a key corresponding in shapewith the cut-away portion of the bolt and having threads forming acontinuation of the threads on the bolt, a

laterally projecting stop lug on the inner end of said key adapted toengage the outer sides of the fastening nut on the bolt and having aninclined upper surface merging into the threads on the key, and alocking my hand in presence of two subscribing witnut adapted tosurround the recessed end nesses.

of the bolt and said key,

is held in operative position, said nut adapt- 5 ed to ride upon theinclined 111g upon the key to tilt the nut on the bolt.

In testimony whereof I have hereunto set w y the CHARLES H. ROFF:

Witnesses:

ALFRED E. FERoL, SYLVESTER TEATOR.

